Syringe holder



FIG. 1 is a front perspective view of a syringe holder showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a right side elevation view thereof.

The broken lines showing a syringe holder are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a syringe holder, as shown and described. 